Garbage-destructor.



P. W. FOSTER.

GARBAGE DESTRUCTOR. APPLICATION FILED MAR. 17, 1914.

' M Z0 l/VI/E/VTOH v w/ms 8:

, 34 ATTORNEW.

specification. or

application filed Ear up concern t L, FELL W. Fears-11:, wnited States,residing at the county and oi N cted certain new and "s inGarbage-Destrr" lowing is a full, clear,

con erned 421 means for the better a s i a M Mi. tion can pffit ctiuiior such appai wl in these destructors v shi-*ting grate which is Aiidrawn to dump a charge or hot clinker into a cooling chamber, that their blast which is usually forced up through the mass of incandescentclinker for the purpose of cooling the same and providing a forced draftfor the ignition and combos tion of a fresh charge of combustiblematerial, reaches the furnace chamber for a short time, at least, at toohigh a temperature, is ,liable to injure the grate and develop too greata heat within the device and is sometimes impeded by the mass ofclinker.

One of the objects of my invention is to avoid these objections, forwhich purpose l provide a series of fuses or boxes forming the sidewalls of the clinker cooling chamher and constituting paths .by whichthe air supplied for cooling the clinker an promoting combustion isconveyed around and not through the body of hot clinker and distributedover the same in the so e under the grate bars. in this way the whilehighly heated, is not raised to a jectionably high temperature, as w bypassing directly through the incan clicker, is not deprived to the sameor its combustion supporting properties, is always free to reach thegrate bars throngs unobstructed passages, which is not t e case when itis forced through the bed of cli liter, which be more or lesssolid andimpervious.

"her defect in these destructors l have be the result of the stoppa eof'the air circulation through the curb or lining of the fire box, whenthe operation of the device 1S interrupted and the fires banked, Un aordinary conditions, the fore box l V is protected by passing throughtee sistsin securing the castings of the cure 5 {,0 support the combos--e of material, but when fire then suilicient to burn the cu b of thefurnace. m

o l have provided tie ranches, one leading to the cl r the other to theon tnat fire is bank-ed the the curb may be maintained with nishing: airto the fire.

,er improvements in the construction oi the device which I have devisedhave suited from experience and observation or" the operation of:destructors of this kind, For example, the sides of the curbs above andaround the grate bars are made up 5 wardly and inwardly instead ofoutwar i inclined to facilitate the discharge of clinker when the grateis withdrawn, ant L-O prevent the arching of the clinker, whwithoutwardly inclined curbs which so is- 'times' formed a skewback inducingthe area,

was liable to occur.

Again, I may employ in the clinker ing chamber an inclined grate toreceive the charges of clinker, and to retain the clinker $35 inposition while cooling. in such case I use a hinged plate or lip whichforms a stop for the clinkerwhen turned up, and a slide or chute for thedischarge of the same, into a car or other receptacle, when turned down.

.inoiher improvement resides in forming open in the side walls of thehollow curb tnrough which a part of the air forced through these curbsmay escape and impiupon the ends or upon such portions oi are liable tobecome overheated i, and still another improvement con.-

gether by through bo1ts,'the ends of wt c are extended on through theweld of the structor and provided with short which take up andcompensate for any expansion of the bars that may result from theintense heat to which they are subjected.

These improvements are illustrated in the 1% accompanying drawing, inwhich i have shown in Figure 1 the destru'ctor in central verticalsection; in Fig. 2 a detail of the curb construction; and in Fig. 3 aportion x the curb with the openings therein,

here employed, comprising a grab-bucket A, which brings charges ofgarbage and refuse to the device and delivers them into a chute I orhopper B. From this the material is allowed to drop through ahydraulically operated door (in into the fire box or combustion chamberD, in which it is ignited either by fuel or by the heat of the chamberitself.

' In the lower part of the combustion cham-' ber, immediately above thegrate bars, is a hollow curb E, the inner walls of which inclineupwardly and inwardly, that is to say, the curb is widest at the top,for the reasons above set forth. This curb forms a continuous passagefor air or steam, and is provided with an inlet F from a fan or blower,of either hot or cold air or a source of steam, and an outlet G from themiddle of its rear end which extends down into an air chamber II. Fromthe latter there runs a passage K into the clinker cooling chamber,containing a valve L and a second passage M tp the outer air, containingalso a valve N. i

I may use any form of clinker grate or hearth, but in this particulardevice I use an inclined grate O to receive the charges of clinker. Atthe bottom of such a grate I place a rotating flap or lip P, controlledby hand, which normally holds the clinker on the grate, but which, whenturned down as shown in dotted lines, when the door R is opened, forms achute over which the clinker slides from the grate into a car or otherreceptacle S. v

The charges-of material when practically burned out in the fire box aredeposited by the withdrawal of the grate bars T in the form of a mass ofclinker, onto the grate bars 0, and in previous forms of destructor theair for burning the next charge of material was forced up .from thespace beneath the grate, through the mass of hot clinker to the gratebars T.

For reasons which I have above explained, this is objectionable, and Itherefore provide along the walls of the clinker cooling chamber aseries of boxes or flues V open to the space below the grate bars 0 andprovided with a large number of holes W at their upper ends. The forceddraft passes up through these boxes, is distributed by the holes intothe space beneath the grate, gradually cooling the clinker, and thenpasses up through the fire. In this way the air is heated before itreaches the fire, while at the same time the walls of the clinkerchamber are cooled and protected from injury.

The curb E is composed of sections of cast iron or steel, which are heldtogether by through bolts Y, in the usual manner, but

the ends of these bolts extend outentirely through the walls of thedestructor where they are-provided with nuts between which and the sidewall or plates thereon are springs X which relieve the destructivetemperature strains on the bolts.

i In Fig. 3' I,have shown in detail one of a number of openings Z,'whichI provide in the curb or the passage from the same. Air or steam escapesthrough openings and improvements which I have abovedescribedconstitute, I believe, the last step which makes for theeconomy and practicability of the destructor. Practicalexperience withthe use of these devices has demonstrated their great value andimportance.

What I claim is:

1. The combination with a furnace and its grate bars adapted for thedestruction of garbage, of a hollow curb for the combustion chamber andpassages leading to the outer air and to the space below the grate bars,whereby a circulation of air or steam may be maintained through the sameand the fire, orthrough the same into the outer air, as set forth.

2. The combination in a garbage destructor with a combustion chamber, amovable grate and a clinker cooling chamber beneath the same, of ahollow curb for the combustion chamber, and passages from the samehaving branches leading to the outer air, and to the clinker chamber, asset forth.

3. In a garbagedestructor, the combination with. a combustion chamber, aclinker cooling chamber beneath the same adapted to receive the clinkerdischarged from the combustion chamber, and means for cooling theclinker and the walls of the clinker chamber and supplying air or steamto the grate bars of the combustion chamber, comprising a series ofboxes or flues located said nuts and the walls to relieve thetemperature strains on the bolts.

3 5. In a garbage destructor, the combination with a combustion chamber,a clinker cooling chamber beneath the same and a grate within 'theclinker chamber for receiving the clinker discharged from thecombustion' chamber, of a series of boxes or flues located at the sidesof the clinker grate and along the Walls of the clinker cooling chamberprovided with an inlet opening below the clinker grate and outletopenings above the clinker grate whereby air or steam is conducted frombeneath the clinker grate to the grate bars of the combustion chamber.6. In a garbage destructor, the combination with a combustion chamber, aclinker cooling chamber beneath the same, a grate within the clinkerchamber for receiving the clinker discharged from the combustionchamber, and means for cooling the Walls of the clinker chambercomprising a series of boxes or fiues located along the Walls of the 15clinker cooling chamber provided with an inlet opening for air below theclinker grate and discharge openings therefor above the same.

In testimony whereof I afilx my signature 20 in the presence of twosubscribing Witnesses.

PELL WILLIAM FOSTER.

Witnesses:

THoMAs J. BYRNE, JOHN J. BULLERD.

